Platform computing-scale.



J. s. BRADLEY.

PLATFORMl COMPUTING SGALE.

APPLIOATION FILED JULY 26. 1908.

Patented Jan. 12, 1909.

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PLATFORM COMPUTING SCALE.

APPLIOATION FILED JULY 25, 1908.

909,744. Patented Jan. 12, 1909.

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UNITED STAT ES PATENT OFFICE.

JOHN STURGUS BRADLEY, OF NEW CONCORD, OHIO.

PLATFORM COMPUTING-SCALE.

To all whom it may concern:

Be it known that I, JOHN STURGUS BRAD- LEY, a citizen of the United States, residing at New Concord, in the county of Muskingum and State of Ohio, have invented certain new and useful Improvements in Platform Computing-Scales, of which the following is a specification.

My invention relates to the improvement of platform computing scales and the objects of my invention are to provide an improved construct-ion of scales of this class wherein is provided improved means for distributing the weight effect; to secure-a corresponding action of the weighing parts of my device regardless of the position of the weight on the weighing platform and to produce certain improvements in details of construction and arrangement of parts which will be more fully pointed out hereinafter. These objects I accomplish in the manner illustrated in the accompanying drawings, in which:

Figure 1 is a front elevation of my improved scales, Fig. 2 is a vertical section on line :zcm of Fig. 1, Fig. 3 is a sectional view on line g/-y of Fig. 1, Fig. 4L is a sectional view on line a-a of Fig. 1, and, Fig. 5, is a detail sectional view illustrating the pivotal bearing connection between a scale beam extension and the chart or indicator operating bar.

Similar numerals refer to similar parts throughout the several views.

1 represents the horizontal supporting base of the scales, from opposite sides of the center of which rise pairs of parallel bearing standards 2 and rising from the base 1 on the inner side of each of the standards 2 is a pair of vertical and parallel standards 3, the upper portions of which are bent inwardly to form horizontal terminal arms 3a.

l represent opposing scale beams which are weighted at their outer ends as indicated at ta, each of said beams being provided adjacent to its weighted outer end portion with laterally projecting knife edge bearings 5, the lower edge portions of which bear in the inclined recesses or central notches of agate bearings 6 mounted in the upper portions of the standards 2. On the inner side of the standards 2, the scale beams extend between the standards 3 beyond which said scale beams are bent or turned rearwardly at right angles, thereby forming parallel rearwardly extending beam extensions 4b. The

Specification of Letters Patent.

Application filed July 25, 1908.

Patented'Jan. 12, 1909.

Serial No. 445,338.

rear end portion of each of the beam exten-` tions, which contact with bearings 9 in the upper end portions of said hangers. The equalizing bar 8 passes through and is centrally suspended in aslotted opening formed in the lower end portion of a vertical chart operating bar 10, and the upper outwardly bent portion of which is toothed on its forward face as indicated at 10a. The toothed upper portion 10a'of the bar 10 engages a pinion wheel 11 carried on the usual chart cylinder operating shaft 12 through the rotation of which a chart cylinder 13 is made to display weight .and price indicating figures or characters through a sight opening 14a of a casing 14 in the usual manner. The construction and arrangement of the parts of the rotary chart and its supporting shaft are well known, however, and therefore are not illustrated in details herein.

15 represents a horizontally disposed scale platform or weighing tray, which has depending therefrom on each side of its center a pair of vertical arms 16 which extend on opposite sides of the corresponding scale beam 4t and which have their lower terminations above the platform 1. Between each pair of arms 16, I provide a pair of vertically disposed hanger bars 17, with the upper slotted end portions of which engage knife blade bearing projections le of the beam 4. The lower end portions of the hangers 17 are provided with lateral bearing projections 17a, which have a bearing engagement with the undersides of the platform arms 16.

Between the upper horizontal portions of each pair of standard arms 3a is pivoted a disk 18, this pivotal connection being effected by providing said disk with oppositely located knife edge bearing projections 18a, the lower edges of which bear in the V- shaped upper` sides of agate bearings 19 carried by said standard terminations 3a. Each of the disks 18 has connected therewith one end of a exible strap 20, which strap running partly over or about said disk, depends therefrom and carries a hanger the' beams; 4f-Y and their extensions tb.

this? movement of.' said' beams; 1t 1s obviousv 2l through which passes loosely the inner end portion of the corresponding beam Ll,A said beam being provided with a knife edge bearing in the lower portion of said. hanger. From each of the disks 2O depends a weight carrying arm a which terminates in a suitable weight or pendulum 2Gb.

To the lower end of the bary l()v I attach the upper end of the piston rod 22 of the usualformof dash pot or resistance cylinder 23 which:A is suitablyv` affixed to they frame# worin.

Inr: operation it willbe understood. that a weight? placedy on the platformj 1.5 and a consequent downward movement of the arms IG, willi result through the connections andw contacts heretofore described ina downwardl swinging; movement ofI the end portions of that partial rotary motion. will be imparted tothe disks 1:8y and a consequent upward and.. outward` swinging movement of the pendulums carried by said disks, the pendu'- 1um.;weigl1ts thus offering; resistance in proportion to they weight placed on. the plat-l form'.- Througlr. the correspondingrmovementv of the opposing beams 45 and the connection=of1V theihanger's 7 Awith the equalizing; bar: 8 and. the central contact of the latterl with thel operating'. bar l0, itv isobvious that `with the pinion ll, will impart the desired bar, must result as will readilybe seem. in imparting the same degree of downward movement tothe operating bar l0 when a weight is supported on the platform centrally or at one side of the center thereof,

thereby insuring uniform and accurate operation of the operating bar regardless ofY the position of; thev weight applied to`v the platform. It is also.obvious-that the weight indicatedE will: be4 the same even though the scalesare'supported at an inclination from a vertical position.

lVhat I claimis:

In af weighing;Vv mechanism', the combinationwith' a base,v a pair of opposing beams fulcrumed above saidbase, a suspended pendulum for. each of saidI beams, and.-v connections between saidbeams and pendulums7 of an equalizing` bar pivotally connecting said beams,` an indicator operatingr bar to which said equalizing bar is centrally en*- gaged,l and a platform supported by said beams.

In testimony whereofl I affix my signature in= presence of two=witnesses JOHN STURGUS BRADLEY. Witnesses:

L. CARLy S'roUGHToN7 C. C. SHEPHERD. 

